ASN Wikibase Occurrence # 235849
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| Date: | Saturday 9 May 2020 |
| Time: | 13:19 |
| Type: |  Bellanca 8GCBC Scout |
| Owner/operator: | Northern California Soaring Assoc |
| Registration: | N4116Y |
| MSN: | 232-76 |
| Year of manufacture: | 1976 |
| Total airframe hrs: | 7282 hours |
| Engine model: | Lycoming O-320-O2E |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Byron Airport (C83), Byron, CA -
 United States of America
|
| Phase: | Take off |
| Nature: | Banner and glider towing |
| Departure airport: | Byron Airport, CA (C83) |
| Byron Airport, CA (C83) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The accident airplane was conducting a glider tow flight. Security camera video recordings of the accident sequence revealed that the tow airplane became airborne about midway down the runway and proceeded to make a shallow climb with the glider in trail at a similar altitude.
After the tow airplane became airborne, the glider pitched upward and ascended to a higher altitude while the tow airplane remained in a shallow climb. Shortly afterward, the tow airplane began a shallow descent. Both aircraft then leveled off, with the glider still at a higher altitude than the tow airplane. As the glider began to descend and then ascend, the tow airplane pitched downward in a nose-low attitude, impacted the runway, and nosed over. A postimpact fire ensued. A pilot-rated witness stated that the tow airplane was at an altitude of about 100 ft above ground level at the time that the glider began to ascend after descending.
The pilot of the glider reported that, shortly after takeoff, the canopy began opening and closing rapidly. The glider pilot also reported that, as he attempted to secure the canopy while maintaining control of the glider, he became briefly disoriented. The glider pilot turned back toward the airport and saw that the tow airplane had crashed. The glider landed uneventfully. The glider pilot stated that part of his preflight check was to ensure that the canopy was closed and locked. Postaccident examination found no evidence of any preexisting mechanical malfunction with the glider canopy latching mechanism. It is likely that the pilot did not successfully lock the canopy before takeoff.
The open canopy likely distracted the glider pilot, and he allowed the glider to ascend to an excessive altitude behind the tow airplane, which forced the tow airplane into a nose-down attitude while at a low altitude.
Postaccident examination of the tow airplane revealed no mechanical malfunctions that would have precluded normal operations. The tow rope-cutting mechanism was engaged; thus, the tow pilot likely cut the tow rope at some point during the flight. (The tow rope was located about 80 ft beyond the main wreckage of the tow airplane in the grassy area adjacent to the runway.) However, the airplane was at an altitude that precluded recovery from the nose-down pitching moment that was induced by the high altitude of the glider.
Probable Cause: The tow airplane pilot’s loss of control resulting from the glider pilot’s failure to maintain a proper altitude behind the tow airplane, which caused the tail of the tow airplane to be lifted upward and the tow airplane to pitch nose down while at a low altitude. Contributing to the accident was the glider pilot’s distraction when the canopy opened in flight.
Accident investigation:
 |
|
Sources:
https://eastcountytoday.net/byron-1-dead-in-airplane-crash-near-byron-airport/
https://www.nbcbayarea.com/news/local/east-bay/plane-flips-catches-fire-in-crash-at-byron-airport/2287494/
NTSB
https://flightaware.com/live/flight/N4116Y
https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N4116Y
Location
Images:
Photos: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-May-2020 22:23 | Geno | Added |
| 09-May-2020 23:23 | Geno | Updated [Aircraft type, Phase, Departure airport, Source, Narrative] |
| 09-May-2020 23:40 | Geno | Updated [Aircraft type, Registration, Cn, Operator, Source, Narrative] |
| 10-May-2020 06:34 | harro | Updated [Registration, Source] |
| 11-May-2020 09:58 | The2ndBaron | Updated [Nature, Damage] |
| 21-Jun-2021 07:18 | aaronwk | Updated [Time, Nature, Destination airport, Source, Narrative] |
| 08-May-2022 07:37 | Captain Adam | Updated [Source, Narrative, Category] |
| 20-May-2022 22:15 | Captain Adam | Updated [Narrative, Accident report, Photo] |
| 20-May-2022 22:15 | Captain Adam | Updated [Photo] |
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